Stop for shade-rollers.



G. R. GRIGG.

STOP POR SHADE ROLLERS.

APPLICATION FILED JAN.1a. 1912.

1,053,806. Patented Feb. 18, 1913.

UNITED STATES PATENT OFFICE.

GEORGE RENNIE GRIGG, OF COFFEYVILLE, KANSAS.

STOP FOR SHADE-ROLLERS.

To all whom t may concern Be it known that I, GEORGE R. GRIGG, a citizen of the United States, and a resident of Cof'eyville, in the county of Montgomery and State of Kansas, have invented a new and Improved Stop for Shade-Rollers, of which the following is a full, clear, and exact description.

My invention relates to a spring stop for window shades or curtain rollers.

In the present form of shade rollers, the plug or ferrule in the ratchet end, carries two pawls or dogs which are attached to the ferrule by means of rivets. As is Well known, these pawls are frequently so loosely mounted upon the rivets, that they bend out of their plane of action and fail to engage the dog seats, or so tightly mounted on their pivots that they will not move at all.

An object of my invention is to overcome the objectionable features inherent to the old form of spring stops, and to provide a stop of comparatively few parts, of a simpler construction, and one positive of detinite action at all times.

I attain the aboveout-lined object by loosely mounting upon the body of the curtain or shade, a dog plate adapted to engage the dog seats in the supporting rod.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the figures, and in which- Figure 1 is a transverse sectional View adjacent the end of the shade carrying my 1 mproved spring stop and taken on the line 1-1 of Fig. 3, looking in the direction of the arrow; Fig. 2 is a view similar to Fig. 1, but showing the dog plate in its locked position, and Fig. 3 is a fragmentary transverse sectional view taken on the line 3 3 of Fig. 1.

Described more in detail, I have shown a wooden curtain cylinder 4, upon which 1s wrapped the shade 5, said cylinder having an end closing cap 6, loosely journaled 1n which cap is the supporting rod 7, the opposite ends of which are suitably mounted in brackets such as 8. The rod 7 carries a coil spring 9, one end of which is attached to the cylinder 4 and the other end to said rod, and within one end of the rod is a pair Speciication of Letters Patent.

Application filed January 18, 1912. Serial No. 671,847.

Patented Feb. 18, 1913.

of oppositely-disposed dog seats 10, all as is common to the present form of curtain structures.

Fastened to one end of the cylinder 4 and concentrically disposed relative to the rod 7 and within the cap 6, is an end plate 11 having a series of peripherally disposed projections 12, adapted to engage the cap 6 and cylinder 4. As shown more particularly in Fig. 3, the projections are bent over for forming a pair of diametricallydisposed extensions 13, each of which eX- tensions is bent substantially at right angles so as to pass through an aperture in the face of the plate 11, and form a pin 14, which pin is bent back upon itself, as shown at I15, to form a square-end pin, but it is to be understood that a projection or pin 14 of any suitable construction may be fastened directly to the face of the plate 11.

Loosely mounted upon the face of the plate 11, disposed between said late and the cap 6, and disposed substantlally concentric relative to the rod 7, is a dog plate 15, which plate is substantially circular in plan, having a recessed projection 16 extending outwardly from diametrically opposite sides. Vithin the recess 17 of the projection 16 is disposed the pin 14. By this construction, it will be seen that the plate 15 has a limited sliding movement relative to the rod 7. The plate 15 has a cent-ral circular recess 18, in which recess is disposed the rod 7, said plate 15 being in alinement with the seats 10. Projecting into the recess 18, is a pair of transverse oppositely-disposed teeth 19 facing in opposite directions and both facing in the direction of unwinding of the spring 9, so that these teeth 19 resemble the pivoted pawls in the old form of construction, and the stop face of each of the teeth 19 is disposed in alinement with the advanced side of the recess 17.

The shade is actuated as is common with devices now in common use, but it will be noted by referring particularly to Fig. 1, that during the unwinding of the spring, the plate 15 rides freely on the rod 7, and by drawing the curtain down slowly approaching the stop, the plate 15 will fall by its own weight, until the upper tooth 9 falls into or is caught by one side of the dog seat 10,

as is shown more clearly in Fig. 2, thereby holding the rod 7 under spring tension relative to the cylinder 4C.

Having thus described my invention, I claim as new and desire to secure by Letters Patent:

In a device of the character described, a roller, a stationary shaft formed With notches on the opposite side thereof, a spring surrounding said shaft and secured at one end to said shaft and at the other end to said roller whereby when said spring is Wound the same will tend to rotate said roller, a plate rigidly connected with the roller formed with a plurality of ears, and a purality of apertures, said ears being benttoward said apertures and then bent so as to extend through said apertures in a direction at right angles to the surface of the plate whereby projecting stops are provided, a reciprocating plate formed with an aperture surrounding said shaft, and a pair of slots for accommodating said stops, said plate being also formed with a pair of inwardly projecting dogs or pawls adapted to fit into said notches at different times for locking said roller against rotation.

In testimony whereof I have signed my name to this speciiication in the presence of two subscribing witnesses.

GEORGE RENNIE GRIGG.

G. M. COTNER, CI-rAs. T. Biolm'r'r.

Copies of this patent may be obtained for ive cents each, by addressing the Commissioner of Patents,

Washington, D. C. 

